[C++][Parquet] LONE - [C++] Add encrypted parquet files to apache parquet-testing repository

[asfimport]

Add encrypted parquet files to apache parquet-testing repository (https://github.com/apache/parquet-testing) for the purpose of testing.

Reporter: Akshay / @akshaybadhe
Assignee: Revital Sur / @revit13

PRs and other links:

• GitHub Pull Request #7

_{Note: This issue was originally created as PARQUET-1909. Please see the migration documentation for further details.}